The restrictive factory air filter and air intake housing are replaced by the K&N Typhoon air intake which is designed to dramatically reduce air flow restriction as it smoothes and straightens air flow.
KN 69-5311TTK Cold-Air Intake System Typhoon Kit for 13-14 Genesis Coupe 2.0L L4
KN 69-8618TS Cold-Air Intake System Typhoon Kit for ES350/Camry/Silverado 1500
KN 69-5309TS Cold-Air Intake System Typhoon Kit for 11-14 Optima/Sonata 2.0L L4
KN 69-5323TS Cold-Air Intake System Typhoon Kit for Hyundai Veloster 1.6L Gas
KN 69-5302TTK Cold-Air Intake System Typhoon Kit for 10-12 Genesis Coupe 2.0L
K&N 57-Series FIPK Cold Air Intake System for 2003-2006 Nissan 350Z 3.5L V6